Means for regulating receptor-clocks.



G; A. eoon'son.

MEANS FOB. RBGULATING REGEPTOR CLOCKS.

APPLICATION TILED 0CT.17, 1910.

H 1 WM M w 3 v m aw 1 an G. A. GOODSON.

- MEANS FOR REGUILATING RECEPTOR CLOCKS.

APPLICATION FILED OCT. 17, 1910. I

Patented Sept. 23, 1913.

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. G. A. GOODSON.

MEANS FOR REGULATING RECEPTOR CLOCKS.

APPLIICATION FILED OCT. 17, 1910. 1 073,675, Patented Sept. 23, 1913.

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.B %A% Zor!ceg3! G. A. GOODS ON. MEANS FOR REGULATING RECEPTOR GLOGKS.

APPLICATION TILED OCT. 17, 1910. 1,073,675, Patented Sept. 23, 1913.

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W W w l/ w CwQw GEORGE A. GOODSON, F MINNEAPOLIS, MINNESOTA.

MEANS FOR REGULATING RECEPTOR-CLOCKS.

Specification of Letters Patent. Patented Sept. 23, 1913. I

Application filed October 17, 1910. Serial No. 587,431.

To all whom it may concern:

Be it known that I, GEORGE A. GoonsoN, a subject of the King of GreatBritain, residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements in Meansfor Regulating Receptor-Clocks; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same. Y

My present invention relates to apparatus for regulating clocks bHertzian waves and is particularly directe to the improvement of themechanisms for this purpose disclosed and broadly claimed in my priorapplication S. N. 452,573, filed September 11, 1908, and in my priorapplication S. N. 545,022, filed February 21, 1910.

The present invention consists of the novel devices and combination ofdevices hereinafter described and defined in the claims.

My present invention is directed chiefly to the provision of simple andefficient means for preventing detrimental or interfering actions, bystray Hertzian waves or electromagnetic oscillations which are notintended for action thereon, and which, in practice, has been found willbe produced in certain localities and at various times, particularly bylong natural electrical discharges, but also by other causes.

One highly important feature of the present invention is found in themodification of the means shown in my prior application S. N. 545,022for opening the relay circuit and grounding the antenna, it havlng beenfound in practice that where it has been necessary to have the receptormechanism at a considerable distance from the receptor clock, it isundesirable to have the antenna circuit running to and from the clock.In practice it has been found that during electrical storms, long trainsof electro-magnetic waves, which are too long in duration to be takencare of by the operation of the selector device of the said latter notedprior application, will set the hands of the receptor clock, if the saidhands are within the setting zone, to-wit, within the period comm'encingat 2% minutes before and extending to 2% minutes after every third hour.

Another important improvement relates to a safety cut-out which is soarranged that,

in case of a storm, the setting apparatus will becut out before it hashad time to 0 on the hands of the receptor clock,'an thus rate permitsthe hands to be set but once every parts being broken away and someparts being removed; Fig. 2 is a. side elevation of the parts shown inFig. 1; Fig. 3 is a horizontal section taken on the line 11: m of Fig.1; Fig. 4 is a detail in front elevation, showing the lightning cut-outdevice; F ig.- 5 is a plan view of the parts shown in Fig.

4; Fig. 6 is a front elevation of the clock circuit cut-out; Fig. 7 is adiagrammatic view of the complete receptor mechanism; and Fig. 8 is adiagrammatic view of the modified form of the complete receptormechanism.

In the detail description hereinafter given,

the following classification of parts and notations thereof is made.Clock circuit cut-outa and its powers. Lightning cutoutb and its powers.vice0 and its powers. Double acting switch-d and its powers. Receivingaerial,

'coherer, decoherer, relay and selectore and its powers. Receptor clockproperf and its powers.

Hand setting de- 8 4 .The receptor clock proper and hand setting deviceshown in the drawings, and in connection with which the saidimprovements are used, are preferably the same as those described in myprior application S.

Referring to F 6,-the minute hand f and the pinion f are rigidlyconnected to the main arbor F. The gear f engages the pinion f in theratio of three to one, thus making one complete rotation in three hours,which, by referring to said prior application, will be found to be theinterval between the transmitter discharges. .The gear f is providedwith a short laterally pro- 5 jecting pin an, adapted to engage a shortarm a of a contact lever a pivoted at a The free end of the lever a hasa downward projection adapted to engage a drop of mercury included in ahard rubberreeept l through the bottom of which is inserted a contactpin a touching the mercury for contact. To the opposite sideof the levera and secured to it, is'a heavy arm a so that, normally; the downwardlyprojecting end of a is held out of contact with the mercury and isbrought to rest against the pin a that is, when the stud a is notengaged with the arm a".

Lightning cut-out.-This device is shown in detail intFigs. t and 5.Referring to these figures, b is a cam rigidly connected with the mainarbor j, which also carries the minute hand f. This cam engages a lever19' comprising two oppositely project- 'ing arms and intermediatelypivoted at 6 One end is adapted to engage a mercury contact cup 6* andthe other adaptable to be caught and held after being raised by the cam,by a lug or projection b on the handsetting armature lever 0 Thearmature lever also carries an inwardly projecting stud I) adapted toengage and hold the lever b in the raised position until the clock hasbeen set and the armature lever is receding to its normal position whenit will drop, thus disengaging itself from the mercury cup and openingthe circuit. The cam and the minute hand are set diametrically oppositeon the main arbor.

Double acting 8'wz'tch.This is shown in Fi 7, and consists of theordinary type of po arized relay, except that a contact is made witheither throw of the armature tion 545,022, and consists of a slow actingarmature lever e adapted to make contact with a through the step uplever c at the end of the transmitted signal from the master clock.

The receiving aerial, coherer, decoherer and relay are ordinary wirelessinstruments. Operation-Let us assume that the clock is five minutes ofsix, as in Fig. 6. At this time and for ten minutes more, the stud a isholding the lever a in contact with the mercu in the cup a". If therehas been no atmosp eric or other electro-magnetic disturbance to makethe selector contact and thereby ,move the hand-setting armature lever,the lightning cut-out lever 6 will,

at one end, be engaged in'the mercury cup 6* and, at the other end, belocked by the lug b. Thus a metallic contact is made from one cup to theother by way of the clock work. Two wires 1 and 2 run from the cohererreceptor to the clock, the current entering the clock-setting magnet 0batteries 5, thence to the selector contact 0 through 6. Wirel isconnected with the,

other selector contact-2?.

double acting switch'iseohnected across the two selector contacts anda,through the ';wires 7 and 8. Thus a high resistance circuit is made,when the clock is in-the aforesaid position, through the clock anddouble acting switch. The clock-setting magnets 0 will not operate onthe slight current that passes, but'the rela armature d is drawn intocontact with. the purpose of which will be explained later. On therelease of either mercurycontact in the, clock, this with d.

Returning now tothe clock in the position statedsuppose, at thisinstant, the selector, for any reason whatever, works and makes contactbetween 6 and e The current on the completion of the circuit energizesthe magnet c and attracts the hand-setting armature lever 0 whichimmediately strikes the periphery of the setting cam 0 (the V notch notcoming into positlon until 2% minutes of the hour), releases the lever bfrom the lug 6 The lever 72 then drops upon the stud b (but does notrelease from the cup 7)), until the circuit is broken at the selectorcontacts, when the armature 0 recedes and the-lever drops upon the smallside of the cam 6 thus releasin itself from the mercury cup 6. Thus it1s seen that the clock cannot repeat this operation until another threehours have passed, or until both mercury cups are again in contact. Ifthere had been no disturbance before the hour the clock would havereceived the signal rom the master clock and righted itself, opening thecircuit as before.

Returning to the double acting switchr The high .resistance 'windingxdof the armature lever will be drawn into contact on the side 0Z whenboth mercury cups a and bf were in contact with the levers a and b. Thisclosed the relay circuit from thecoherer e, throu h wire 9, armaturelever (2 contact a w1re 10, thence through the relay magnets e, throughwire 11, through the battery 12 and thence returning to the other sideof the coherer 6. Hence, it is evident that the relay circuit is onlyclosed while the contacts in the clock are closed, which is only for ashortinterval every third hour. An opening of the magnetcircuit of thedouble acting switch reverses the contact to d from d, thereby openingthe relay circuit and short-circuitthus operating the clock magnets, thehigh resistance winding d, on the double acting switch, isshort-circuited. This condition would reverse the armature on said relayand render the coherer inoperative too soon. Hence, the low reslstancew1nd1ng' on the said switch is in series with the clock-setting circuit,to retain the armatureof the relay in the proper position, that is, inthe same position as the high resistance coils place it.

The modification shown in Fig. 8, of the complete receptor mechanism,dlfiers from Fig. 7 chiefly in that three wires are used in place of twobetween the coherer, receptor and the clock, and that the low resistancewinding on the double acting switch is dispensed with. The circuit,including the said switch magnet winding, is made through the twomercury cups a and b in the clock and includes a battery 12. The switch,therefore, performs the same functions as shown in Fig. 7. Theclock-setting circuit is the same as that in Fig.7, except that it doesnot include the switch magnets.

The operations of the selector, tapperback and relay were described. inmy former patent application S. N. 545,022.-

What I claim is:

1. The combination with a clock, of clock setting mechanism sensitive toHertzian waves, operative at predetermined intervals to set the clockduring a predetermined period of said interval, and means also sensitiveto Hertzian waves operative to throw the normal clock setting mechanismout of action and thus cause setting of the clock to be skipped duringthe next settin interval.

2. The combinationwith a 0100 of clock setting mechanism sensitive toHertzian waves, operative at predetermined intervals to set the clockduring a predetermined period of said interval, means also sensitive toHertzian waves operative to throw the normal clock setting mechanism outof action and thus cause setting of the clock to be skipped during thenext setting interval, and clock actuated means for restoring the'saidclock setting mechanism-to operative condi tion, thereby rendering thesame operative during a second following clock setting-interval.

3. The combination with a clock, of clock setting mechanism sensitive toHertzian waves, normally operative at predetermined intervals to set theclock during a predetermined period of said interval, means alsosensitive to Hertzian waves operative during an interval which includesbut is lon er than the clock setting period, for throwing the said clocksetting mechanism out of action during the next following clock settinginterval, and clock actuated means for restoring said clock settingmechanism to operative condition for action during a second .followingclock setting interval.

In testimony whereof I aflix in presence of two witnesses.

GEORGE A. GOODSON. Witnesses:

Amen V. Swanson, HARRY D. Klmonr.

my signature

